mysql.txt and postgresql.txt are updated according to...

http://article.gmane.org/gmane.comp.bug-tracking.roundup.devel/2882

Author: Alexander Smishlajev

TODO.txt

@@ -2,8 +2,7 @@ This file contains items that need doing before the next release:
 
 Required:
 - implementing logging for roundup-server, including command-line switches
-- fix documentation referring to configuration (config.ini, mysql.txt and
-  postgresql.txt)
+- fix documentation referring to configuration (config.ini)
 - fix documentation referring to customisation using interfaces.py
 - fix admin_guide referring to structure of trackers
 - add config.ini section descriptions - DONE?